- changed the default reset duration to 10ms instead of 20ms
- changed the delay after reset to 10ms or reset duration, whichever is higher, instead of 200ms
- added a busyCallback feature, to allow to service periodic actions during wait for BUSY termination
- ` // register a callback function to be called during _waitWhileBusy continuously. `
- ` void setBusyCallback(void (*busyCallback)(const void*), const void* busy_callback_parameter = 0); `
- added example GxEPD2_RotaryUsingBusyCallback.ino
